mirror of
https://github.com/Sei-Lisa/LSL-PyOptimizer
synced 2025-07-01 15:48:21 +00:00
1cdf9f7ff0
Implements another TODO. There was a TODO about a new counter per scope, but that makes no sense. The renamer only acts on global variables, global function and parameter names, state names, and event parameters. We're already restarting the counters at every function, which is the closest to what that TODO was about.
104 lines
3.6 KiB
Python
104 lines
3.6 KiB
Python
# (C) Copyright 2015-2017 Sei Lisa. All rights reserved.
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#
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# This file is part of LSL PyOptimizer.
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#
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# LSL PyOptimizer is free software: you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# LSL PyOptimizer is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with LSL PyOptimizer. If not, see <http://www.gnu.org/licenses/>.
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# Optimizer class that wraps and calls the other parts.
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import lslfuncs
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from lslfoldconst import foldconst
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from lslrenamer import renamer
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from lsldeadcode import deadcode
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from lsllastpass import lastpass
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class optimizer(foldconst, renamer, deadcode, lastpass):
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# Default values per type when declaring variables
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DefaultValues = {'integer': 0, 'float': 0.0, 'string': u'',
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'key': lslfuncs.Key(u''), 'vector': lslfuncs.ZERO_VECTOR,
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'rotation': lslfuncs.ZERO_ROTATION, 'list': []
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}
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# explicitly exclude assignments
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binary_ops = frozenset(('+','-','*','/','%','<<','>>','<','<=','>','>=',
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'==','!=','|','^','&','||','&&'))
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assign_ops = frozenset(('=','+=','-=','*=','/=','%=','&=','|=','^=','<<=','>>='))
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def Cast(self, value, newtype):
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"""Return a CAST node if the types are not equal, otherwise the
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value unchanged.
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"""
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if value['t'] == newtype:
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return value
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ret = {'nt':'CAST', 't':newtype, 'ch':[value]}
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if 'SEF' in value:
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ret['SEF'] = True
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if 'X' in value:
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ret['X'] = value['X']
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return ret
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def optimize(self, treesymtab, options = ('optimize','constfold','dcr',
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'warntabs')):
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"""Optimize the symbolic table symtab in place. Requires a table of
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predefined functions for folding constants.
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"""
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if 'optimize' not in options:
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return treesymtab
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# Don't perform "a"+"b" -> "ab" unless explicitly requested.
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self.addstrings = 'addstrings' in options
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self.foldtabs = 'foldtabs' in options
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self.warntabs = 'warntabs' in options
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self.shrinknames = 'shrinknames' in options
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self.constfold = 'constfold' in options
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self.optlistlength = 'listlength' in options
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self.optlistadd = 'listadd' in options
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self.dcr = 'dcr' in options
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# Math that works fine except in rare corner-cases can be optimized.
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self.cornermath = 'cornermath' in options
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tree, symtab = self.tree, self.symtab = treesymtab
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self.globalmode = False
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if self.dcr:
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if self.constfold:
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self.FoldScript(warningpass=False)
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self.RemoveDeadCode()
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# Make another fold pass, since RemoveDeadCode can embed expressions
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# into other expressions and generate unoptimized code.
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# Or make the first pass here if DCR is disabled.
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if self.constfold:
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self.FoldScript(warningpass=True)
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names = self.LastPass()
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if self.shrinknames:
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self.ShrinkNames(UsableAsParams = names['libfuncs'])
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treesymtab = (self.tree, self.symtab)
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del self.tree
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del self.symtab
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return treesymtab
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def __init__(self, lib):
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self.events = lib[0]
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